In the days leading up to Tuesday's primary, Gingrich's focus on Delaware paid off with endorsements from two GOP officials who previously had endorsed Romney, including Republican National Committeewoman Priscilla Rakestraw, a longtime leader in the state Republican Party.

"Just the fact that he's been so committed to Delaware has been really great," said Sen. Colin Bonini, R-Dover, a longtime Gingrich supporter who introduced Gingrich at his first campaign appearance and was the first elected official in Delaware to endorse him.

"We're going to try to deliver this for you, Mr. Speaker," Bonini told Gingrich on Monday night during his finalDelaware campaign appearance.

Gingrich has visited Delaware at least eight times in the past month, spreading his message about the need for limited government, balanced budgets and American energy independence.

Delaware is holding its Republican presidential primary Tuesday along with Connecticut, New York, Pennsylvania and Rhode Island. Delaware's polls are open from 7 a.m. to 8 p.m. Tuesday in all three counties. Only Republicans, who account for about 178,000 of the state's 613,000 registered voters, are allowed to vote in the GOP primary.